Preparation:
This question is to do with:
Proving one of the specified theorems: If the lengths of two sides of a triangle are unequal, then the degree-measures of the angles opposite to them are unequal, with the greater angle opposite to the longer side.
Proving one of the specified theorems:
If the lengths of two sides of a triangle are unequal, then the degree-measures of the angles opposite to them are unequal, with the greater angle opposite to the longer side.
A key idea in the proof is the following: